Novel platinum complex.

摘要

A platinum complex having a superior antitumor activity is discolsed. The platinum complex has a structure represented by the formula: <CHEM> wherein A and B independently represent a lower alkanoyloxy group which may have a halogen atom substituent, or in combination represent a group: <CHEM> wherein R1 and R2 independently represent a hydrogen atom, a hydroxyl group, or a lower alkyl group, or in combination with each other and with the adjacent carbon atom a cyclobutane ring, and R3 represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a sulfo group, or nitro group.